Cops hope surveillance video will help catch a firebug who intentionally set four construction sites ablaze in Queens.

The male suspect, wearing a gray hoodie, is seen on the 16-second video near the site of the suspicious blaze at 10:40 p.m. on Wednesday night, right before the empty two-story home was engulfed in flames.

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The blaze that ripped through the vacant home under construction on 67th Drive near 110th Street in Forest Hills was the fourth case of suspected arson in the area this month, according to police.

The massive fire on Wednesday night had Forest Hills residents on edge over another arson attempt.

Police is looking for a suspect of four Queens arsons cases on Nov. 8, Nov. 15, Nov. 17, and Nov. 25. All four cases were on construction sites.

"Of course I'm scared, it's just a few houses over," Steven Teh, 42, told the Daily News on Thursday. "I'm hoping that they find out who have done this."